OpenWrt system configuration including MidnightCommander, screen and ssmtp

openwrt_system.sh

opkg install bash bind-dig diffutils digitemp dstat file htop kmod-usb-serial-pl2303 less lftp lsof mc mtr nmap rsync screen ssmtp sudo tcpdump

#File highlighting in "mc"
mkdir -p /usr/lib/mc/extfs.d
touch /etc/mc/sfs.ini

wget --no-check-certificate https://raw.github.com/MidnightCommander/mc/master/misc/filehighlight.ini -O /etc/mc/filehighlight.ini

#Favorite "mc" settings
mkdir -p /etc/skel/.mc/
chmod 700 /etc/skel/.mc
cat > /etc/skel/.mc/ini << EOF
[Midnight-Commander]
auto_save_setup=0
drop_menus=1
use_internal_edit=1
confirm_exit=0

[Layout]
menubar_visible=0
message_visible=0
EOF
cp -r /etc/skel/.mc /root/

#Disable mouse + path "changer"
wget --no-check-certificate https://raw.github.com/MidnightCommander/mc/master/contrib/mc-wrapper.sh.in -O - | sed 's|@bindir@/mc|/usr/bin/mc --nomouse|' > /usr/bin/mc-wrapper.sh
chmod a+x /usr/bin/mc-wrapper.sh
echo "[ -x /usr/bin/mc-wrapper.sh ] && alias mc='. /usr/bin/mc-wrapper.sh'" >> /etc/profile

#Screen settings
cat >> /etc/screenrc << EOF
defscrollback 1000
termcapinfo xterm ti@:te@
hardstatus alwayslastline '%{= kG}[ %{G}%H %{g}][%= %{= kw}%?%-Lw%?%{r}(%{W}%n*%f%t%?(%u)%?%{r})%{w}%?%+Lw%?%?%= %{g}][%{B} %d/%m %{W}%c %{g}]'
vbell off
EOF

#Prompt colors
sed -i 's/^export PS1.*/export PS1='\''\\\[\\033\[01;31m\\\]\\h\\\[\\033\[01;34m\\\] \\w #\\\[\\033\[00m\\\] '\''/' /etc/profile

#Make outgoing emails to reach the SMTP server:
sed -i "s/^mailhub=.*/mailhub=mail.upcmail.cz/;s/^rewriteDomain=.*/rewriteDomain=xvx.cz/;s/^hostname.*/hostname=`uci get system.@system[0].hostname`.`uci get dhcp.@dnsmasq[0].domain`/" /etc/ssmtp/ssmtp.conf

#Reboot email
sed -i '/^exit 0/i echo -e "Subject: Reboot `uci get system.@system[0].hostname`.`uci get dhcp.@dnsmasq[0].domain`\\n\\nOpenwrt rebooted: `date; uptime`\\n" | sendmail petr.ruzicka@gmail.com' /etc/rc.local

#Disable IPv6 in Unbound (and flooding the logs by ipv6 error messages)
uci add_list unbound.@unbound[-1].include_path=/etc/unbound/unbound_include
cat > /etc/unbound/unbound_include << EOF
server:
        do-ip6: no
EOF